What outside diameter pipe will these work on?

There for 6" pipe not sure if that's the inside diameter or outside. The are flexible can stretch a little.

Can you tell me what the inside diameter is?

Just under 6 inches. They are designed to fit 6 inch diameter PVC or iron.

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Description

🔧 Connect with Confidence — The Last Coupling You'll Ever Need!

PRECISION FIT FOR 6 PIPES - Designed to snugly fit pipes with outer diameters from 6.3" to 6.8", ensuring a watertight seal every time.
TRUSTED CERTIFIED QUALITY - Meets ASTM, CSA, and UPC standards with USA-made reliability for professional-grade performance.
BUILT TO LAST HALF A CENTURY - Engineered for a 50-year leak-proof service life with premium elastomeric PVC.
UNIVERSAL PIPE COMPATIBILITY - Seamlessly connects cast iron, plastic, steel, copper, and more for versatile plumbing solutions.
EFFORTLESS NO MESS INSTALLATION - Forget primers and glues—install quickly with corrosion-resistant stainless steel clamps.

The Fernco 1056-66 is a 6-inch flexible PVC pipe coupling designed for professional and DIY plumbing projects. Crafted from durable elastomeric polyvinyl chloride and secured with 300-grade stainless steel clamps, it offers a 50-year leak-proof lifespan. Compatible with a wide range of pipe materials including cast iron, plastic, steel, and copper, it fits pipe outer diameters between 6.3" and 6.8". Certified to ASTM, CSA, and UPC standards, this coupling ensures chemical and sewer gas resistance without the hassle of primers or glues, making it a trusted choice for reliable, mess-free plumbing connections.

Specifications

Size	6" x 6"
Material	Polyvinyl Chloride
Brand	Fernco
Color	Black
Item dimensions L x W x H	9.27 x 9.27 x 5.99 inches
Connector Type	Adapter
Thread Size	6.8 inches
Exterior Finish	Stainless Steel
Thread Type	NPT
Item Weight	2.28 Pounds
Number of Pieces	1
Global Trade Identification Number	00018578000148
Manufacturer	Fernco Inc.
UPC	018578000148
Part Number	P1056-66
Item Weight	2.28 pounds
Product Dimensions	9.27 x 9.27 x 5.99 inches
Item model number	1056-66
Shape	cylinder
Item Package Quantity	1
Measurement System	inch
Included Components	P1056-66 Coupler Adapter
Batteries Included?	No
Batteries Required?	No
Warranty Description	Warranty

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